<p>
    <label for='title'>Name of post (conference room A, meeting room C, desk A, desk B, etc.)</label><br />
    <%= form.text_field :title %>
</p>

<p>
    <label for='category_id'>Category</label><br/>
    <%= select('post', 'category_id', Category.find(:all).collect{|cat| [cat.title, cat.id]})%> 
</p>

<p><label for="image">Picture</label> 
<%= file_column_field "post", "image" %></p>